Open flame heating furnace for steel wire heat treatment

Abstract

The invention provides an open flame heating furnace for steel wire heat treatment. The open flame heating furnace comprises a preheating section, a heating section and a temperature equalization section, wherein a flue gas chamber is arranged at the upper part of the preheating section and is internally provided with a flue gas-air heat exchanger; an induced draft fan is arranged at the lower part of the preheating section and is connected with a first air inlet pipe and a second air inlet pipe; the induced draft fan is connected with one end of the flue gas-air heat exchanger by means of thefirst air inlet pipe; the other end of the flue gas-air heat exchanger is connected with a high-temperature air pipe; one end of the high-temperature air pipe is connected with a flat flame burner, and the flat flame burner is connected with a combustion gas inlet pipe and a premixed combustion gas pipe; the premixed combustion gas pipe is connected with a mechanical air-fuel mixer; the upper endof the mechanical air-fuel mixer is connected with a premixed air pipe, and the premixed air pipe is connected with the second air inlet pipe; the lower end of the mechanical air-fuel mixer is connected with a mixed gas pipe, and the mixed gas pipe is connected with a premix burner. According to the open flame heating furnace for the steel wire heat treatment, the amount of combustion gas in thefurnace can be controlled, so that the efficiency of the heat exchanger is increased; furthermore, the loss of furnace shut down caused by cleaning the heat exchanger is reduced, and the service efficiency is increased.

Description

technical field [0001] The invention belongs to heat treatment equipment, in particular to an open flame heating furnace for heat treatment of high-carbon and low-carbon steel wires. Background technique [0002] There are generally three types of existing open flame heating furnaces for steel wire heat treatment, one is a heating furnace that uses the exhaust smoke to preheat air in the furnace for hot air combustion heating, the other is a flue gas direct exhaust premixed combustion heating furnace, and the other is a front A simple combination of two heating furnaces, that is, the front heating section adopts a hot air combustion heating structure, and the rear heating section adopts a premixed combustion structure. Air, so as to reduce the flue gas temperature and reduce fuel consumption. The pre-mixed combustion heating furnace can adjust the air-fuel ratio by adjusting the mechanical air-fuel mixer, and then control the combustion composition to ensure that the steel w...

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